You should try to look for a doctor which supports VBAC (vaginal birth after c-section).
Though the things which your gynae said has a possiblity of happening, ie, wound bursting, it would be helpful to have a gynae who's experienced in VBAC to offer you better advice.
From what you're saying, it doesn't seem that your gynae supports VBAC.
My first baby was also delivered via c-sect due to pre-eclampsia (pregnancy high blood pressure) at 36 weeks. But my gynae encouraged me to aim for VBAC for my 2nd and he said that I should be able to do that after 1 yr of the c-sect. So I feel, you should maybe consider a 2nd opinion.
I wouldn't recommend my gynae because he has raised his price quite a bit after I delivered my first baby in 2008. I am not pregnant now but just sharing what my gynae told me.